<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
</head>
<body>
    <button onclick="m1()">点右面</button>
    <button onclick="m2()">点我</button>
    <button onclick="m3()">点左面</button>
</body>
<script>
    function m1(){
        alert("点我干嘛");
        alert("都说了让你点右面");
    }
      function m2(){
          alert("will");
          alert("never");
          alert("change");
          alert("until");
          lert("death");
      }
  
      function m3(){
        alert("点我干嘛");
        alert("都说了让你点左面");
    }


 /* function sum(){
      var i=1;
      var j=3;
      console.log("i+j="+(i+j));
  }
  sum();

var a=8;
var b=9;
  function m1(x,y){
     document.write("a+b="+(x+y));
  }
m1(a,b);*/


</script>
</html>